Soil Nail Support System for the Extension of A14 Trunk Road
Near the city of Cambridge in Great Britain, the trunk road between Girton and Histon is being widened by one lane per direction. The A14 is an important national highway that connects the Port of Felixstowe on the east coast with the British road network. Several steep sidehill cuts have to be comprehensively stabilized within the scope of the A14 widening. Self-drilling soil nail is a good helper for stabilizing slopes. Soil nails are installed top-down by the sidehill cuts that are carried out in individual stages, and the cut face is secured immediately as construction progressed. To install the...
The Successful Completion of Jingzhang High-speed Rail Donghuayuan Tunnel
At 17:30 on July 19th, 2018, with the pouring completion of the last slab lining concrete from Beijing to Zhangjiakou high-speed rail Donghuayuan tunnel, it marks that the tunnel used in cut and cover method without maintenance in the deep foundation pit of the longest water-rich area in China have been finished successfully. As a auxiliary project for the 2022 Winter Olympic Games in Beijing, Jingzhang high-speed rail is also the first intelligent high-speed railway in China. It is the first time that the automatic control precipitation and early warning system as well as new material robot spraying and waterproof...
Xi’an-Chengdu high speed railway entered the stage of full acceptance
On November 13th, the test train numbered 55601 departed from Xi’an North Station to Sichuan Jiangyou Station, marking the completion of the comprehensive acceptance stage before the high-speed railway entered into operation. After the opening, the train running time from Xi’an to Chengdu will be shortened from the current sixteen hours to three hours. On August 27, 2008, the State Council examined and approved the national overall plan for recovery and reconstruction after 2008 Sichuan earthquake, and Xi’an-Chengdu high speed railway was included. On October 27, 2012, the opening ceremony was held in Xi’an North Station. After five years of...
Sinorock Visitor Team in AIMEX
The 2017 Asia-Pacific’s International Mining Exhibition (AIMEX) came to an end on August 31st，Sinorock sent visitor team to Australia and visited the exhibition. AIMEX is one of the largest mining exhibition in the Asia Pacific region and one of the three largest mining exhibitions in the world, which founded in 1970. The exhibition took place for three days at the Showground Exhibition Center in Sydney, Australia. About 280 exhibitiors came from Germany, China, South Korea, USA, Australia and other countries , every exhibits are mining supplies which well suited to the theme of the show. Visitors can find the exhibits...
Sinorock®’s staff promotion ceremony —— Grow and win-win，towards excellence
On August 23rd, the staff promotion ceremony of Sinorock was successfully held in Luoyang administrative area. The ceremony was mainly promotion and awards for six excellent employees. The TV screen showed respectively the development trajectories of zhang Xiaoyue, Wei Jingru, zhang Weihao, Xiao Zhiguang, zhang Lina and Xu Jianfen. There are the talented woman and the company “goalkeeper” who is strict with himself between them. They relied on their efforts and sweat gained the company’s approval. Subsequently, the leaderships of the six staff gave the tutor messages to wish them to rise to a higher level in work. Finally, the...
Sinorock organized staff to participate in fire knowledge training
Safety and quality are the eternal theme of industrial enterprises. Sinorock attaches importance to product quality, because product quality can protect customer construction safety, the same, the company also attaches importance to the safety of all employees. Just over the quality month activities, on August 19, the company ushered in the Henan Provincial Fire Brigade instructors to lecture on the 2017-year special seminar on fire fighting knowledge. Sinorock organized all staff of Luoyang office area and Luoyang factory in the morning and afternoon respectively to attend the lecture. In the lecture, the real and brutal fire case are very alarming,...
Some reasons for soil nailing wall’s safety and quality assurance
The soil nailing wall is a kind of technology for supporting and strengthening the in-situ soil. The soil nails are integrated with the soil around tightly, so that they can form into a type of composite soil, relying on the frictional force of contact surface. Based on the analysis of the constructional scheme of the national stadium, the key factors for controlling the quality of the construction were found. The quality system during the project should be managed strictly. And the diameter, length and strength of the anchorage ought to be executed exactly. This scheme provided reasons for the national...
Sinorock®’s Quality-Month Warning Meeting
Quality is the life and soul of the enterprise. Only high-quality products can make consumers leave a good impression on the enterprise. Quality is essential for the long-term development of an enterprise. Only with the facts and data to speak and with the quality to expand the market, an enterprise can be overcoming all obstacles and keep going forward. On June 23, Sinorock simultaneously held the 2017 quality month warning meeting at the Luoyang factory and Changzhou company. The meeting mainly summarized and informed the quality problems that the company appeared before for warning all staff of the potential quality...
Practice of hole drilling for soil nails
Soil nail construction involves the formation of holes followed by insertion of steel reinforcement, grouting and construction of soil-nail head typically in a recess on the slope surface. In Hong Kong, drilling of a soil-nail hole is commonly carried out by pneumatic percussive rigs (Plate 1) with air as the flushing medium. Temporary casing is normally not required in the typical saprolitic soils encountered in Hong Kong. In special circumstances, a more robust drilling rig, for example, the Odex type drilling equipment, is used for driving temporary casing into a hole concurrent with drilling to prevent the hole from collapsing...
Suitability of soil nailing with respect to soil types
As soil nail construction requires temporary stability in both the staged excavation and also the drilled hole stability, any soils with sufficient temporary self-support of about 2m sub-vertical height for minimum of 1 to 2 days and hole stability for minimum four hours are considered suitable ground for soil nailing. With the above criteria, the following soil types would be suitable for soil nailing: i. Stiff fine/cohesive soils ii. Cemented granular soils iii. Well graded granular soils with sufficient apparent cohesion of minimum 5kPa as maintained by capillary suction with appropriate moisture content iv. Most residual soils and weathered rock...